Two point charges of + 20.0 C and - 8.00 C are separated by a distance of 20.0 cm. What is the intensity of electric field E midway between these two charges?
A) 25.2 106 N/C directed towards the negative charge
B) 25.2 106 N/C directed towards the positive charge
C) 25.2 105 N/C directed towards the negative charge
D) 25.2 105 N/C directed towards the positive charge
E) 25.2 104 N/C directed towards the negative charge
Question 2It takes 10. J of energy to move 2.0 C of charge from point A to point B. What is the potential difference between points A and B?
A) 20. V
B) 0.20 V
C) 5.0 V
D) 0.50 V
E) zero
Question 3How long does it take for a rotating object to speed up from 15.0 to 33.3 rad/s if it has an angular acceleration of 3.45 rad/s2?
A) 4.35 s
B) 5.30 s
C) 9.57 s
D) 10.6 s
E) 63.1 s
Question 4For an orbital quantum number of 2, the magnetic quantum number can take on what allowed values?
What will be an ideal response?
Question 5Consider a 1.40 kW hair dryer operated on 120. V. What is
(a) the current?
(b) its resistance?
Question 6The Earth reversed its magnetic field about how many years ago?
A) 700
B) 700,000
C) 11
D) 7000
E) 70,000,000
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